This is Rex Crum of MarketWatch. Microsoft CEO Satya Nadella is holding a press conference in San Francisco at 10 a.m. Pacific today. It will be the first time Nadella has addressed the media since he took over as Microsoft’s CEO from Steve Ballmer on Feb. 4. Nadella is no debutante, but his public debut will be eyed closely as he answers questions about his vision for Microsoft as a time of massive changes and challenges at the software giant.

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